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The bslib R package provides a modern UI toolkit for Shiny and R Markdown based on Bootstrap. It facilitates:


Install the bslib package from CRAN as follows:


An example

The quickest way to see what {bslib} can do is to run bslib::bs_theme_preview() at the console. This launches a demo app containing both {bslib} and {shiny} UI components as well as an theming widget (bslib::bs_themer()) overlaid on the app. See real-time theming to learn more.

An animation showing bslib theming app. As the user changes the Bootswatch theme and Bootstrap settings, the app's appearance changes in real-time.

Get started

Since {bslib} covers a wide array of uses, it has numerous getting started articles, each focusing on a particular interest:

Getting help

There are two main places to get help with bslib:

Code of Conduct

Please note that the bslib project is released with a Contributor Code of Conduct. By contributing to this project, you agree to abide by its terms.